Table 6. Inhibitory effect of S. ferruginea extracts against MDA-MB 231 breast cancer cell line at different incubation times.

		IC50 (μg/mL)a
Extracts	24 h	48 h	72 h
Methanol	65.19	41.99	19.27
95% CI	53.22–79.86	31.42–56.11	13.11–28.32
Aqueous	82.60	69.63	50.35
95% CI	65.36–104.4	56.16–86.32	41.26–61.44
Tamoxifenb	7.71	6.66	5.64
95% CI	6.73–8.82	5.92–7.49	5.00–6.35

^a Data are expressed as IC₅₀ and the values are presented with their respective 95% confidence interval (95% CI).

^b Positive reference standard.